Effect of the deformation temperature on the structural refinement of BCC metals with a high stacking fault energy during high pressure torsion
- Autores: Voronova L.1, Chashchukhina T.1, Gapontseva T.1, Krasnoperova Y.1, Degtyarev M.1, Pilyugin V.1
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Afiliações:
- Institute of Metal Physics, Ural Branch
- Edição: Volume 2016, Nº 10 (2016)
- Páginas: 960-965
- Seção: Structure and Properties of the Deformed State
- URL: https://journals.rcsi.science/0036-0295/article/view/170943
- DOI: https://doi.org/10.1134/S0036029516100232
- ID: 170943
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Resumo
The structural evolution in bcc metals (molybdenum, niobium) with a high stacking fault energy (300 and 200 mJ/m–2, respectively) is studied during high pressure torsion in Bridgman anvils at temperatures of 290 and 80 K. It is established that cryogenic deformation of these metals does not result in twinning; however, banded structures are formed at the initial stage of deformation. Misoriented kink bands, which inhibit the formation of a homogeneous submicrocrystalline structure similarly to twins, form in molybdenum. The banded structures in niobium are characterized by low-angle misorientations; they do not suppress the formation of a submicrocrystalline structure and the refinement of microcrystallites to nanosizes.
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Sobre autores
L. Voronova
Institute of Metal Physics, Ural Branch
Autor responsável pela correspondência
Email: highpress@imp.uran.ru
Rússia, Yekaterinburg, 620137
T. Chashchukhina
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Rússia, Yekaterinburg, 620137
T. Gapontseva
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Rússia, Yekaterinburg, 620137
Yu. Krasnoperova
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Rússia, Yekaterinburg, 620137
M. Degtyarev
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Rússia, Yekaterinburg, 620137
V. Pilyugin
Institute of Metal Physics, Ural Branch
Email: highpress@imp.uran.ru
Rússia, Yekaterinburg, 620137
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